export function formatDate(date, fmt) {
	if (/(y+)/.test(fmt)) {
		fmt = fmt.replace(
			RegExp.$1,
			(date.getFullYear() + "").substr(4 - RegExp.$1.length)
		);
	}

	let o = {
		"M+": date.getMonth() + 1,

		"d+": date.getDate(),

		"h+": date.getHours(),

		"m+": date.getMinutes(),

		"s+": date.getSeconds(),
	};

	for (let k in o) {
		if (new RegExp(`(${k})`).test(fmt)) {
			let str = o[k] + "";

			fmt = fmt.replace(
				RegExp.$1,
				RegExp.$1.length === 1 ? str : padLeftZero(str)
			);
		}
	}

	return fmt;
}

function padLeftZero(str) {
	return ("00" + str).substr(str.length);
}
